Patents by Inventor Yifeng Li
Yifeng Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240115713Abstract: Disclosed are a polyethylene glycol conjugate drug, and a preparation method therefor and the use thereof. Specifically, the present invention relates to a polyethylene glycol conjugate drug represented by formula A or a pharmaceutically acceptable salt thereof, a method for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, an intermediate for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, and the use of the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof in the preparation of a drug.Type: ApplicationFiled: July 21, 2021Publication date: April 11, 2024Inventors: Gaoquan LI, Nian LIU, Yongchen PENG, Xiafan ZENG, Gang MEI, Sheng GUAN, Yang GAO, Shuai YANG, Yifeng YIN, Jie LOU, Huiyu CHEN, Kun QIAN, Yusong WEI, Qian ZHANG, Dajun LI, Xiaoling DING, Xiangwei YANG, Liqun HUANG, Xi LIU, Liwei LIU, Zhenwei LI, Kaixiong HU, Hua LIU, Tao TU
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Publication number: 20240114232Abstract: A photographing device may include an image sensor to capture a first image; a first quick release interface to detachably connect with at least one expansion structure; and a first processor configured to: control the photographing device to perform an operation based on a first instruction input by a user at the photographing device and a second instruction sent by the expansion structure under a condition that the photographing device is connected with the expansion structure. The operation may comprise controlling the image sensor to capture the first image.Type: ApplicationFiled: December 14, 2023Publication date: April 4, 2024Applicant: SZ DJI TECHNOLOGY CO., LTD.Inventors: Dexi LI, Shun MA, Zeyuan XUAN, Yifeng SUN, Zhou YANG
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Patent number: 11636672Abstract: Techniques for estimating crop maturity using remote sensing imagery are disclosed. A method may include a step of providing a remote sensing image of crops acquired at an image acquisition time, for example, a synthetic aperture radar image acquired from a satellite. The method may also include a step of predicting a maturity level of the crops at the image acquisition time based on input crop maturity data from an input time and weather-based growth indication data from between the input time and the image acquisition time. The weather-based growth indication data may include growing degree day data. The method may further include a step of updating the predicted maturity level to an updated maturity level of the crops based on the remote sensing image and a response model relating remote sensing image information to crop maturity information. The predicting and updating steps may involve performing a particle filtering operation.Type: GrantFiled: October 12, 2020Date of Patent: April 25, 2023Inventors: Abhijit Sinha, Weikai Tan, Yifeng Li
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Patent number: 11427834Abstract: The present disclosure relates to use of a lectin receptor-like kinase LecRK-IX.1 as a protein for regulating insect resistance of Arabidopsis thaliana. A. thaliana with high resistance to Bemisia tabaci can be cultivated by reducing the expression of, or knocking out, an encoding gene of the protein. Therefore, Arabidopsis thaliana with the high-level resistance to Bemisia tabaci can be cultivated. The gene and its encoded protein can be applied to plant genetic improvement.Type: GrantFiled: July 28, 2020Date of Patent: August 30, 2022Assignee: PLANT PROTECTION RESEARCH INSTITUTE, GUANGDONG ACADEMY OF AGRICULTURAL SCIENCESInventors: Yifeng Li, Zhenfei Zhang, Chun Chen, Longyu Yuan
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Publication number: 20210380638Abstract: Protein A chromatography is generally less effective in removing antibody aggregates under typical conditions. Provided is a combination and a method that can significantly improve Protein A's aggregate removal capability. The combination comprises polyethylene glycol (PEG) and a salt (chaotropic or kosmotropic) as wash and elution buffer additives. The synergistic effect of salt and PEG results in almost complete separation of monomer from aggregates. For the case used for demonstration, in comparison with the control run the optimized procedure reduces aggregates in elution pool from 20% to 3-4%. This new method, by facilitating aggregate removal at the capture step, improves the overall robustness of downstream process.Type: ApplicationFiled: December 20, 2019Publication date: December 9, 2021Inventors: Yifeng LI, Ying WANG, Yuan ZHANG, Weichang ZHOU
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Patent number: 11001855Abstract: The present disclosure provides a rice planthopper-sensitivity gene BGIOSGA015651 and the use thereof. The applicant found a gene BGIOSGA015651 for regulating rice planthopper-resistance by studying on rice varieties BG1222 and TN1. The gene expression level of BGIOSGA015651 in the insect-resistant variety is hundreds of times or more different from that of the insect-susceptible variety. The expression of this gene can be reduced or knocked out by molecular breeding methods or genetic engineering methods, resulting in that the insect-susceptible plant can obtain high insect-resistance. The resistance level of the insect-susceptible rice variety TN1 is of level 9 before knock-out, and the resistance level thereof is significantly increased to level 0-1 after the rice planthopper-sensitivity gene BGIOSGA015651 is knocked out.Type: GrantFiled: March 9, 2018Date of Patent: May 11, 2021Assignee: PLANT PROTECTION RESEARCH INSTITUTE, GUANGDONG ACADEMY OF AGRICULTURAL SCIENCESInventors: Yifeng Li, Zhenfei Zhang, Hanxiang Xiao, Yanfang Li, Yang Zhang
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Publication number: 20210130836Abstract: The present disclosure relates to use of a lectin receptor-like kinase LecRK-IX.1 as a protein for regulating insect resistance of Arabidopsis thaliana. A. thaliana with high resistance to Bemisia tabaci can be cultivated by reducing the expression of, or knocking out, an encoding gene of the protein. Therefore, Arabidopsis thaliana with the high-level resistance to Bemisia tabaci can be cultivated. The gene and its encoded protein can be applied to plant genetic improvement.Type: ApplicationFiled: July 28, 2020Publication date: May 6, 2021Inventors: Yifeng Li, Zhenfei Zhang, Chun Chen, Longyu Yuan
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Patent number: 10990806Abstract: The present disclosure provides technical solutions for improving facial image capturing, recognition, and authentication, including: collecting a face image in response to a facial scan instruction (e.g., for facial recognition) using a camera of a mobile terminal; calculating a measure of image brightness (e.g., a luminance value) of the collected face image; enhancing, when a value of the measure of image brightness of the collected face image is less than a first preset threshold, luminance of light that is emitted from a display of the mobile terminal to a target luminance value, and re-collecting a face image using the camera of the mobile terminal and calculating a corresponding value of the measure of image brightness for the re-collected face image; and performing, when the value of the measure of image brightness of the re-collected face image falls within a preset value range, facial recognition based on the re-collected face image.Type: GrantFiled: February 19, 2019Date of Patent: April 27, 2021Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Lina Yuan, Jiwei Guo, Yifeng Li, Liang Wang
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Publication number: 20210110157Abstract: Techniques for estimating crop maturity using remote sensing imagery are disclosed. A method may include a step of providing a remote sensing image of crops acquired at an image acquisition time, for example, a synthetic aperture radar image acquired from a satellite. The method may also include a step of predicting a maturity level of the crops at the image acquisition time based on input crop maturity data from an input time and weather-based growth indication data from between the input time and the image acquisition time. The weather-based growth indication data may include growing degree day data. The method may further include a step of updating the predicted maturity level to an updated maturity level of the crops based on the remote sensing image and a response model relating remote sensing image information to crop maturity information. The predicting and updating steps may involve performing a particle filtering operation.Type: ApplicationFiled: October 12, 2020Publication date: April 15, 2021Inventors: Abhijit SINHA, Weikai TAN, Yifeng LI
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Patent number: 10878070Abstract: A method for controlling a terminal is provided. The terminal includes a capturing apparatus and at least one processor. An image is acquired by the capturing apparatus. A motion parameter of the terminal is obtained. Image processing on the acquired image is controlled to be performed based on the motion parameter being equal to or less than a preset parameter threshold, and skipped based on the motion parameter being greater than the preset parameter threshold.Type: GrantFiled: June 25, 2018Date of Patent: December 29, 2020Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Lina Yuan, Luyi Lin, Yifeng Li, Liang Wang
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Patent number: 10657244Abstract: Embodiments of the present disclosure disclose an identity authentication method performed at a computing device, the method including: obtaining a sequence of finger gestures on a touchpad of the computing device from a user, wherein each finger gesture has an associated pressure type on the touchpad; generating a corresponding character string according to the sequence of finger gestures; comparing the character string with a verification code of a user account associated with an application program; in accordance with a determination that the character string matches the verification code, granting the user access to the user account associated with the application program; and in accordance with a determination that the character string does not match the verification code, denying the user access to the user account associated with the application program.Type: GrantFiled: November 17, 2017Date of Patent: May 19, 2020Assignee: Tencent Technology (Shenzhen) Company LimitedInventors: Xia Yang, Luyi Lin, Yunyun Hao, Yifeng Li, Shaoyu Zhang, Liang Wang, Jiwei Guo
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Publication number: 20200140883Abstract: The present disclosure provides a rice planthopper-sensitivity gene BGIOSGA015651 and the use thereof. The applicant found a gene BGIOSGA015651 for regulating rice planthopper-resistance by studying on rice varieties BG1222 and TN1. The gene expression level of BGIOSGA015651 in the insect-resistant variety is hundreds of times or more different from that of the insect-susceptible variety. The expression of this gene can be reduced or knocked out by molecular breeding methods or genetic engineering methods, resulting in that the insect-susceptible plant can obtain high insect-resistance. The resistance level of the insect-susceptible rice variety TN1 is of level 9 before knock-out, and the resistance level thereof is significantly increased to level 0-1 after the rice planthopper-sensitivity gene BGIOSGA015651 is knocked out.Type: ApplicationFiled: March 9, 2018Publication date: May 7, 2020Inventors: Yifeng LI, Zhenfei ZHANG, Hanxiang XIAO, Yanfang LI, Yang ZHANG
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Publication number: 20190188454Abstract: The present disclosure provides technical solutions for improving facial image capturing, recognition, and authentication, including: collecting a face image in response to a facial scan instruction (e.g., for facial recognition) using a camera of a mobile terminal; calculating a measure of image brightness (e.g., a luminance value) of the collected face image; enhancing, when a value of the measure of image brightness of the collected face image is less than a first preset threshold, luminance of light that is emitted from a display of the mobile terminal to a target luminance value, and re-collecting a face image using the camera of the mobile terminal and calculating a corresponding value of the measure of image brightness for the re-collected face image; and performing, when the value of the measure of image brightness of the re-collected face image falls within a preset value range, facial recognition based on the re-collected face image.Type: ApplicationFiled: February 19, 2019Publication date: June 20, 2019Inventors: Lina YUAN, Jiwei Guo, Yifeng Li, Liang Wang
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Publication number: 20180307819Abstract: A method for controlling a terminal is provided. The terminal includes a capturing apparatus and at least one processor. An image is acquired by the capturing apparatus. A motion parameter of the terminal is obtained. Image processing on the acquired image is controlled to be performed based on the motion parameter being equal to or less than a preset parameter threshold, and skipped based on the motion parameter being greater than the preset parameter threshold.Type: ApplicationFiled: June 25, 2018Publication date: October 25, 2018Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Lina YUAN, Luyi LIN, Yifeng LI, Liang WANG
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Publication number: 20180075230Abstract: Embodiments of the present disclosure disclose an identity authentication method performed at a computing device, the method including: obtaining a sequence of finger gestures on a touchpad of the computing device from a user, wherein each finger gesture has an associated pressure type on the touchpad; generating a corresponding character string according to the sequence of finger gestures; comparing the character string with a verification code of a user account associated with an application program; in accordance with a determination that the character string matches the verification code, granting the user access to the user account associated with the application program; and in accordance with a determination that the character string does not match the verification code, denying the user access to the user account associated with the application program.Type: ApplicationFiled: November 17, 2017Publication date: March 15, 2018Inventors: Xia Yang, Luyi Lin, Yunyun Hao, Yifeng Li, Shaoyu Zhang, Liang Wang, Jiwei Guo
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Patent number: 9841690Abstract: A method for correcting an exposure pattern on a substrate includes obtaining, based on the exposure pattern, displacement adjustment parameters for adjusting displacements of a worktable supporting the substrate in each of a first direction and a second direction, a rotation angle adjustment parameter for adjusting a rotation angle of the worktable in a rotation direction, and a gap adjustment parameter for adjusting a gap between the worktable and a mask plate. The first direction and the second direction are perpendicular to each other in a horizontal plane. The rotation direction is a direction in which the worktable rotates around a central axis of a base table supporting the mask plate. The method further includes moving the worktable based on the displacement adjustment parameters, the rotation angle adjustment parameter and the gap adjustment parameter.Type: GrantFiled: April 21, 2016Date of Patent: December 12, 2017Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Yifeng Li, Hequn Zhang, Xiangming Meng, Hongwei Xing
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Publication number: 20170023864Abstract: A method for correcting an exposure pattern on a substrate includes obtaining, based on the exposure pattern, displacement adjustment parameters for adjusting displacements of a worktable supporting the substrate in each of a first direction and a second direction, a rotation angle adjustment parameter for adjusting a rotation angle of the worktable in a rotation direction, and a gap adjustment parameter for adjusting a gap between the worktable and a mask plate. The first direction and the second direction are perpendicular to each other in a horizontal plane. The rotation direction is a direction in which the worktable rotates around a central axis of a base table supporting the mask plate. The method further includes moving the worktable based on the displacement adjustment parameters, the rotation angle adjustment parameter and the gap adjustment parameter.Type: ApplicationFiled: April 21, 2016Publication date: January 26, 2017Inventors: Yifeng Li, Hequn Zhang, Xiangming Meng, Hongwei Xing
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Patent number: D946312Type: GrantFiled: May 15, 2021Date of Patent: March 22, 2022Inventor: Yifeng Li